Merge pull request #62179 from timothysc/owner_labels

Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Update OWNERS labels for cluster-lifecycle and scheduling

**What this PR does / why we need it**:
Updates auto labeling to make everyone's lives easier. 


**Special notes for your reviewer**:

**Release note**:

```
NONE
```

/cc @kubernetes/sig-cluster-lifecycle-pr-reviews @kubernetes/sig-scheduling-pr-reviews

cmd/kube-scheduler/OWNERS

@@ -2,3 +2,5 @@ approvers:
 - sig-scheduling-maintainers
 reviewers:
 - sig-scheduling
+labels: 
+- sig/scheduling

cmd/kubeadm/OWNERS

@@ -12,5 +12,7 @@ reviewers:
 - jamiehannaford
 - kad
 - xiangpengzhao
-- mattmoyer
 - kargakis
+labels: 
+- area/kubeadm
+- sig/cluster-lifecycle

pkg/scheduler/OWNERS

@@ -2,3 +2,5 @@ approvers:
 - sig-scheduling-maintainers
 reviewers:
 - sig-scheduling
+labels: 
+- sig/scheduling